Oil in cooling system, W202, C280, V6
Can anyone help me here. In October 2008, I heard my belt squeeling, looked into the engine compartment, and found water-pump leaking at the bearings. I replaced the pump and fan belt, but also made absolutely sure the motor never ran hotter than normal. Then in late November, during a routine water check, I found oil in the cooling system bottle - immediately ran the car to a shop to investigate. After checking radiator and oil cooler, we found a faulty oil cooler. Replaced it, and all was fine - that is until last week - and found oil back in the cooling system. There is no water in the oil. I have replaced the oil cooler again, but there is still oil in the cooling system. I am fanatical about temperatures and overheating, and can vouch that the car has NEVER run hot. Is there any other way oil can get into the system? I have verified that it is engine oil, and not tranny fluid.
thanks
Rainer
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